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Analog Devices Inc./Maxim Integrated MAX7394ATTYQ+
- Part No.:
- MAX7394ATTYQ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Oscillators
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX7394ATTYQ+.pdf
- Description:
- MEMS OSC XO 33.0000MHZ CMOS SMD
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
MAX7394ATTYQ+ from Maxim Integrated is a precision silicon oscillator with enable control, replacing quartz crystals and ceramic resonators in +2.4V to +3.6V systems. It delivers a factory-set 33MHz CMOS clock output with ±1.0% total accuracy over -40°C to +125°C (TDFN package), 5ns rise/fall time, and 47–60% duty cycle - ideal for USB host controllers and industrial microcontroller timing.
For engineers reviewing the MAX7394ATTYQ+ datasheet, MAX7394ATTYQ+ pinout, MAX7394ATTYQ+ application, or MAX7394ATTYQ+ equivalent, key selection criteria include enable-controlled power-down (<2µA shutdown current), dual-supply architecture (VCC/VCC2), rail-to-rail push-pull CLOCK output, and TDFN-6 packaging for space-constrained embedded timing designs.
Technical Context
The MAX7394ATTYQ+ integrates a temperature-compensated silicon resonator with analog compensation circuitry, eliminating external load capacitors and crystal aging drift. Its ENABLE input provides deterministic on/off control, unlike the autoenable CLKIN function of the MAX7393 variant.
It features separate VCC (core oscillator supply) and VCC2 (output driver supply), allowing independent voltage scaling and improved PSRR. The CLOCK output drives CMOS inputs directly without termination, supporting 1kΩ ground- or 500Ω VCC2-connected loads within 300mV of rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 33MHz - factory-trimmed, no calibration required; matches USB full-speed and MCU system clock requirements. |
| Total Accuracy | ±1.0% over -40°C to +125°C (TDFN) - guaranteed stability across automotive and industrial temperature ranges. |
| Supply Voltage Range | +2.4V to +3.6V for both VCC and VCC2 - compatible with modern low-voltage microcontrollers and SoCs. |
| Shutdown Current | <2µA when ENABLE = low - enables ultra-low-power sleep modes in battery-backed or energy-sensitive systems. |
| Rise/Fall Time | 5ns (CL = 10pF) - ensures clean edge integrity for high-speed digital interfaces and timing-critical peripherals. |
| Duty Cycle | 47–60% - meets CMOS input threshold compatibility and minimizes dynamic power in clocked logic. |
| Startup Time | 2ms - enables rapid wake-up from deep-sleep states without external reset coordination. |
Pinout & Package
MAX7394ATTYQ+ uses a 6-pin, 3mm × 3mm TDFN package with exposed pad (EP), RoHS-compliant and lead-free. Pin 1 is VCC; Pin 2 is GND; Pin 3 is I.C. (internally connected, must tie to GND); Pin 4 is ENABLE; Pin 5 is CLOCK; Pin 6 is VCC2. EP must be soldered to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Oscillator core supply | Provides bias for internal TCXO circuitry; must be decoupled with 0.1µF capacitor to GND. |
| GND (Pin 2) | Ground reference | Common return path for oscillator core and output driver; connects to EP for low-impedance grounding. |
| I.C. (Pin 3) | Internally connected node | Internal test point; must be tied to GND - not left floating or connected elsewhere. |
| ENABLE (Pin 4) | Digital enable control | Active-high logic input; low disables oscillator and forces CLOCK to weak high (10kΩ pull-up to VCC2). |
| CLOCK (Pin 5) | CMOS clock output | Rail-to-rail push-pull output; drives µC/µP clock inputs directly with no external components. |
| VCC2 (Pin 6) | Output driver supply | Independent supply for CLOCK buffer; allows level-shifting and improves noise immunity vs. shared VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces total supply current to <2µA, enabling deterministic low-power states without firmware workarounds. |
| No external components | Eliminates load capacitors, feedback resistors, and crystal matching networks - simplifies PCB layout and BOM. |
| Dual-supply architecture (VCC/VCC2) | Decouples oscillator core from output driver, improving PSRR and enabling mixed-voltage system interfacing. |
| Robust environmental operation | Specified for -40°C to +125°C with ±1.0% accuracy - suitable for under-hood automotive and industrial motor control. |
| Fast 2ms startup | Enables immediate clock availability after wake-up, avoiding system-level delays or PLL lock-time dependencies. |
Applications
| USB Host Timing | Industrial Microcontroller Clock |
|---|---|
Use Scenario: Providing precise 33MHz clock to USB 2.0 transceivers or host controllers in embedded gateways. IC Role / Device Role / Timing Role: Primary system clock source replacing crystal oscillator modules. Use Value: Meets USB full-speed timing jitter requirements (140ps p-p at 48MHz, scaled) while eliminating crystal aging and board-space constraints. |
Use Scenario: Synchronizing real-time control loops in PLCs and motor drives operating at extended temperature ranges. IC Role / Device Role / Timing Role: High-stability timing reference for ARM Cortex-M7/M4-based controllers. Use Value: ±1.0% accuracy over -40°C to +125°C ensures deterministic interrupt timing and PWM resolution without recalibration. |
| Automotive Body Control Module | White Goods System Controller |
Use Scenario: Clocking CAN FD interface and sensor fusion processors in BCMs exposed to under-dash thermal cycling. IC Role / Device Role / Timing Role: Enable-controllable timing source for intermittent communication subsystems. Use Value: ENABLE pin allows synchronized power gating of clock domain during sleep, reducing system quiescent current. |
Use Scenario: Driving main MCU and display controller in washing machines and refrigerators with wide ambient temperature swings. IC Role / Device Role / Timing Role: Factory-programmed 33MHz oscillator for cost-sensitive, high-volume appliance platforms. Use Value: μDFN/TDFN packaging and no external components reduce assembly cost and improve long-term reliability vs. quartz solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si510-33M000000 | 33MHz, ±50ppm (±0.005%), LVDS output, 2.5V/3.3V supply, 6-pin SOT23-6 | Limited to lower drive strength and differential signaling; requires level-shifting for single-ended µC inputs | Choose for ultra-high stability where jitter <100fs RMS is critical; avoid if CMOS single-ended interface or enable control is required. |
| DS3231MZ#T | 32.768kHz TCXO with I²C interface, ±2ppm accuracy, integrated RTC functions | Low-frequency RTC timing only; not a drop-in replacement for 33MHz system clocks | Use only for real-time clock backup; not suitable as primary system clock due to frequency mismatch and functional scope. |
Compared with Si510-33M000000 and DS3231MZ#T, the MAX7394ATTYQ+ uniquely combines enable control, single-ended CMOS drive, 33MHz frequency, and ±1.0% industrial-grade accuracy in a compact TDFN package - making it optimal for cost-sensitive, space-constrained embedded timing where programmability is unnecessary.
Availability
MAX7394ATTYQ+ is available at Aetrix Electronics and suitable for USB host timing, industrial microcontroller clocking, automotive body control modules, and white goods system controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX7394ATTYQ+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing applications.
The MAX7394ATTYQ+ belongs to Maxim's precision silicon oscillator product line, engineered to replace quartz-based timing solutions with higher reliability, smaller footprint, and better shock/vibration tolerance in harsh environments.
FAQ
What is the factory-set output frequency of the MAX7394ATTYQ+?
The MAX7394ATTYQ+ is factory-trimmed to deliver a precise 33MHz CMOS clock output. This frequency is laser-trimmed during manufacturing and does not require external configuration or programming. The "YQ" suffix in MAX7394ATTYQ+ explicitly denotes the 33MHz variant per Maxim's Selector Guide, and the device operates with no external components to generate this frequency.
Does the MAX7394ATTYQ+ require external load capacitors like quartz crystals?
No, the MAX7394ATTYQ+ does not require external load capacitors. As a fully integrated silicon oscillator, it contains an on-chip temperature-compensated resonator and driver circuitry. Unlike quartz crystals or ceramic resonators, the MAX7394ATTYQ+ achieves its specified 33MHz output and ±1.0% accuracy over -40°C to +125°C without any external tuning components.
How does the ENABLE pin function on the MAX7394ATTYQ+?
The ENABLE pin (Pin 4) on the MAX7394ATTYQ+ is an active-high digital control input. When driven high, the oscillator operates normally and outputs a 33MHz CMOS clock on Pin 5. When driven low, the oscillator shuts down, CLOCK enters a high-impedance state with a weak 10kΩ pull-up to VCC2, and total supply current drops below 2µA - enabling deterministic low-power system states.
What is the recommended power supply decoupling for the MAX7394ATTYQ+?
Maxim specifies 0.1µF surface-mount ceramic capacitors from both VCC (Pin 1) and VCC2 (Pin 6) to GND (Pin 2), placed as close to the pins as possible. The exposed pad (EP) must be soldered to GND for thermal and electrical integrity. For large capacitive loads on CLOCK, a larger VCC2 bypass capacitor (≥1000× load capacitance) is recommended to maintain signal integrity.
Is the MAX7394ATTYQ+ pin-compatible with the MAX7393ATTYQ+?
No, the MAX7394ATTYQ+ is not pin-compatible with MAX7393ATTYQ+. While both use the same 6-pin TDFN package, Pin 4 is ENABLE on MAX7394ATTYQ+, whereas it is CLKIN (autoenable input) on MAX7393ATTYQ+. Swapping them without board revision will result in nonfunctional timing behavior - the MAX7394ATTYQ+ requires explicit ENABLE control, not returned-clock sensing.
MAX7394ATTYQ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MAX7394
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Base Resonator:
- MEMS
- Type:
- XO (Standard)
- Frequency:
- 33 MHz
- Function:
- Enable/Disable
- Output:
- CMOS
- Voltage - Supply:
- 2.4V ~ 3.6V
- Frequency Stability:
- -
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 125°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 9.5mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- 0.118" L x 0.118" W (3.00mm x 3.00mm)
- Height - Seated (Max):
- 0.031" (0.80mm)
MAX7394ATTYQ+ FAQ
1.How can I place an order for MAX7394ATTYQ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX7394ATTYQ+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX7394ATTYQ+ reliable?
The price and inventory of MAX7394ATTYQ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX7394ATTYQ+ is usually 5 days.
3.What payment methods are accepted for MAX7394ATTYQ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX7394ATTYQ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX7394ATTYQ+?
MAX7394ATTYQ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX7394ATTYQ+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX7394ATTYQ+?
For technical support, including MAX7394ATTYQ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX7394ATTYQ+ requirements.
6.How does Aetrix verify that MAX7394ATTYQ+ is sourced from the original manufacturer or authorized distributors?
All MAX7394ATTYQ+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX7394ATTYQ+ meets industry standards.
7.What is the process for return or replacement of MAX7394ATTYQ+?
All MAX7394ATTYQ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX7394ATTYQ+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX7394ATTYQ+ part is unused and in its original packaging.
Return procedure for MAX7394ATTYQ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX7394ATTYQ+ Tags
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